TWI279605B - Optical component with holder and manufacturing method thereof - Google Patents

Abstract

As means of the present invention, first, on the optical element, a plate-like peripheral edge part which is protruding, while surrounding an effective part having an optical function thereof, outside from the effective part is provided. Furthermore, at a part of the through hole of the holder, a straight cylindrical part is provided. Then, an outer circumference of the peripheral edge part is tightly fitted to an inner circumferential surface of the cylindrical part of the through hole throughout the entire circumference.

Description

1279605 IX. Description of the Invention: [Technical Field] The present invention relates to an optical component having a holder for fixing an optical component used in the technical field of optical communication, optical information reading, etc. Abutments, and in particular, optical components having a support by a casting process. [Prior Art]

Although it is well known that lenses are used in the fields of optical communication, optical information reading, etc., most of these lenses are generally used to be fixed to the lens holder in advance. Although a plurality of methods for fixing the lenses are provided, it is particularly known that one technique is to cast a raw material glass on the inner side of the metal lens holder while casting it in a spherical or non-spherical shape. And integrating the lens and the support (for example, refer to Japanese Patent Publication No. JP Η 0 3 _ 2 6 5 5 2 9 A or Japanese Patent Publication No. J Ρ Η 0 3 - 2 3 7 4 0 8 A ). This method is simpler than applying a metal film to the periphery of a single lens, and fixing a single lens to a support by metal welding, or by bonding a single lens and a support by sealing with a low-melting glass or the like. And a high-accuracy fixation that achieves low cost between the lens and the support. The technique disclosed in Japanese Patent Publication No. JP Η 0 3 - 2 6 5 5 2 9 A, the protruding portion is provided on the inner peripheral surface of the through hole of the lens holder, and the spherical glass raw material is supported here. On the protruding portion, and in this case, the glass raw material is heated and molded. Simultaneously, the glass is press-fitted to the inner peripheral surface including the protruding portion, whereby the shape of the lens surface is cast by casting and fixed to the holder. Meanwhile, in Japanese Patent Publication No. JP Η 0 3 - 2 3 7 4 0 8 A, the technique used is to provide a holding portion instead of the protruding portion to support the holding 5 312XP / invention manual (supplement) / 94-05/94101807 1279605 Part of the sheet glass raw material, and similar to the Japanese Patent Publication No. JP H03-265529A of this case, simultaneously having a surface formed by casting, press-fitting the lens in the inner circumference of the support a surface, and a stepped portion between the inner peripheral surface and the retaining portion. However, in this method and architecture, the inner side of the lens, which is formed by casting a steep point on the inner peripheral surface of the lens holder, will produce uneven internal stress. When the internal stress is generated, for example, inside the transmission optical component of the lens, the polarization characteristics are thus made uneven, and it cannot be used in a module which particularly requires polarization retention.

In addition, as a result of the formation of the protruding portion during casting, a portion of the glass raw material protrudes from the outside of the mold and causes chipping. However, such uneven protrusion causes defects such as debris, which can be formed on the inner peripheral surface by forming a different from the above-mentioned protruding portion, as described in Japanese Patent Publication No. JP 2 0 0 2 - 6 8 1 9 A. An annular protrusion at one of the opening portions of the lens holder is used to eliminate this defect. However, the shape of the lens holder is complicated and also increases processing costs. In addition, it must deform the annular projection for casting by means of a die of the upper metal, and it deforms the parts of the metal component by an expensive metal mold mainly made of a fragile material or ceramic. Technology is very difficult. On the other hand, in Japanese Patent Publication No. JP H03-237408A, a point is formed on the stepped portion between the holding portion and the inner surface, and uneven internal stress is similarly generated, and this may be at the edge of the lens. Partly caused by debris. In addition, in the above related art, it is necessary to match the thermal expansion coefficient of the lens holder and the glass material (in the above reference, the thermal expansion coefficient of the lens holder is made slightly larger than the thermal expansion system of the glass material 6 312XP / invention specification ( Supplement) /94-05/94101807 1279605 number). Although the matching of the coefficient of thermal expansion is quite important, it is equally important to match the volume of the lens holder to the volume of the glass material. However, if the protrusions and the complicated structure exist on the inner surface of the lens holder, there is also a problem that the matching of the volume cannot be easily achieved. SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the problems of the related art described above, and an object thereof is to provide an optical component having a holder and a manufacturing method in which stress in a non-uniform interior occurring in casting is reduced. And the occurrence of debris will also become smaller.

SUMMARY OF THE INVENTION The present invention is an optical assembly having a support by which the optical components provided by the glass are secured to the inside of the through holes of the support. The means according to the present invention, firstly, is first fixed to the optical member so that the plate-like peripheral edge portion which protrudes around the effective portion has an optical function and is provided from the outside by the effective portion. Further, on the portion of the through hole of the holder, it provides a straight cylindrical portion in which the shape of the segment is not changed in the axial direction. Then, the outer circumference of the peripheral portion is firmly attached to the inner circumferential surface of the cylindrical portion of the through hole to surround the entire circumference. By pressing the optical member against the inner circumferential surface of the cylindrical portion of the holder, it is possible to avoid uneven internal stress on the inside of the optical element, and also to prevent the occurrence of debris or the like, and also to overcome the problem in the polarization characteristics. Further, the airtightness between the holder and the optical member can be ensured by pressing the optical member around the entire circumference of the inner circumferential surface of the through hole of the holder. In addition, it is worth noting that, in one direction perpendicular to the optical axis of the optical element, the segment shape of the effective zero portion of the optical element and the segment shape of the outer circumference of the peripheral portion are rounded, and The diameters are D e and D, respectively, and the difference between D and De is 0.3 mm (mm) or more. 312XP / invention manual (supplement) /94-05/94101807

1279605 By satisfying the above, for example, the portion of the circular optical element of the lens can be stably molded. ^And > It is worth noting that the thickness A of the peripheral portion is in the direction of the optical center and the diameter D of the outer circumference of the same portion. The ratio A / D is 0. More, the thickness A and the maximum thickness of the optical element The Th ratio A/Th is 0 more. Further, the peripheral portion of the optical element has a surface composed of a plurality of planes perpendicular to the optical axis and an outer circumferential surface parallel to the optical axis, and it is worth noting that the intersection with the outer circumferential surface consists of a flat φ The corner portion of the surface is treated to be a corner of a circle, and a radius (unit: mm) of the curvature R, wherein the thickness of the peripheral portion in the optical direction is A (mm), and the range is 〇. 1 $ RS (A - 0· 25)/2. Alternatively, the radius of the R (unit: mm) may be made by the diameter of the outer circumference of the optical element and the outer circumference of the outer part of the optical component are De and D (units are mm), and the range is 0.1. S RS (D-De) / 2 - 0. 0 2 5. By providing trimming on the outer circumference of the peripheral portion of the optical element, the above-described case is press-fitted to the holder, and the occurrence of debris or the like at the edge of the optical element can be effectively prevented. Further, the linear expansion coefficient of the holder is larger than the linear expansion coefficient of the glass of the optical element, and one of the differences from each other is 2 0 X 1 0 or less. Thus, in order to allow for heating and cooling during the casting process, excessively large stresses can be prevented from being applied to the optical member and vice versa. The optical element is provided as a lens, in particular aspherical convex 312XP / invention specification (supplement) /94-05/94101807 effective axis 25 or .5 or as many as the surface diameter, respectively Material *7 / ° C, its sufficient lens 1279605 pieces. Therefore, the holder-bonding lens has a structure in which the lens is an inner circumferential surface press-fitted to the cylindrical straight hole portion of the holder. The lens attached to the through hole of the holder has been fixed, and a cylindrical portion to which a semiconductor optical element is inserted and fixed has been provided, and the semiconductor optical element is hermetically sealed in the cylindrical portion. Moreover, a distance between the lens and the semiconductor optical element is measured so that the light emitted by the semiconductor optical element can be concentrated or collimated, or the received light can be concentrated or collimated by the semiconductor optical element.

Therefore, an optical component in which various types of semiconductor optical components and lenses are combined can be provided. As for the manufacturing method of the optical component having the holder, the present invention is achieved by the following means. It is provided with a through hole and enters the support, and has a straight cylindrical portion which is at least partially unchanged in the shape of the section in the axial direction, and a pair of casting molds are inserted so as to be opposite to the both sides of the through hole, and in a forming space Medium pressure mold glass raw material. Thereby, the optical element has a plate-like peripheral portion protruding to surround the effective portion having the optical function, formed from the outer side of the effective portion, and the outer circumference thereof is firmly mounted on the inner circumferential surface of the cylindrical portion of the through hole of the holder, To surround the entire circumference. By this method, by simultaneously forming the optical element and pressing the optical element to the inner circumferential surface of the cylinder of the holder, occurrence of uneven internal stress and occurrence of debris or the like inside the optical element can be avoided. Further, the airtightness between the holder and the optical element can be ensured by pressing the optical element around the entire circumference of the inner circumferential surface of the through hole of the holder. At this time, by providing a portion of the casting surface of the casting mold which does not contact the holder or the mold is present in the peripheral portion of the optical element mold, at this point 312XP / invention specification (supplement) /94-05/94101807 1279605 At the time of completion, the stamper is completed, and the inner diameter of the cylindrical portion of the through hole for the holder is changed by changing the shape and shape of the portion of the edge portion of the optical member, wherein the contact is not within a predetermined range. The seat or mold, and the volume of the filled glass raw material is maintained at a constant amount. Specifically, the portion of the peripheral portion surrounds the corner portion of the corner portion where it is not in contact with the holder or the mold, and the surface portion composed of the plane intersects the outer circumferential surface of the peripheral portion, thereby changing the radius of curvature. If the volume of the glass raw material to be filled is not appropriate, failure of excessively large stress, casting failure or attachment to the support may occur during casting of the optical component. Although the shape of the portion having the surface of the lens cannot be changed, if the portion that does not contact the holder or the mold is left in the peripheral portion, the portion may have some extensional change in shape, by utilizing these portions, it is avoided as described above. The problem that occurs when the volume of the filled glass raw material is maintained at a constant amount. Moreover, similar to the manufacturing method of the optical component having the holder, it is worth noting that the holder is held at a predetermined position relative to any one of the other molds by the first mechanical means, and when the stamper is completed, The distance between the molds is measured at a predetermined value by a second mechanical means.

By such a mechanical means, the position of the optical element uniquely cast on the inner side of the holder can be accurately measured without using an electronic control means or the like. As described above, according to the present invention, by appropriately selecting the glass raw material and the support material according to the relationship of the linear expansion coefficient, and appropriately setting the volume of the glass raw material according to the inner circumferential surface of the press-fit and the accurate shape, it is possible to have a support. The optical component has less residual internal stress and thus makes its polarization characteristics excellent, wherein the edge portion of the optical element hardly produces 10 312XP/invention specification (supplement)/94-05/94101807 1279605 raw debris or Cracked and provides a fairly good air tightness. Moreover, by combining a semiconductor optical element with these, it is also easy to provide a small-sized optical component excellent in reliability. Other objects and advantages of the present invention will be apparent from the following detailed description and appended claims. [Embodiment] As a preferred embodiment of the optical module having a holder of the present invention, a glass mold aspherical lens is fixed to a metal lens holder as an example. However, specific examples of the invention are not limited thereto. In addition, in the present invention, various types of lenses can be widely applied to an optical component having a holder, wherein various types of optical elements can be manufactured by casting, such as curved mirrors and crucibles can be used as Fixed to the holder with through holes 0 (lens shape design)

1 is a partial view of the fixed aspherical lens 10 of the present invention in the metal lens holder 20, including the optical axis 15 of the lens. Figure 2 is a partial view of only the aspherical lens 10, which similarly includes the optical axis 15 of the lens, and Figures 3A and 3B are topographical views of the aspherical lens. Further, Fig. 4 is a partial view of the metal lens holder 20. For example, in the outer type of the lens, the portion in the direction perpendicular to the optical axis 15 is circular, and the surface shape of the refractive surface (lens surface) of the light is optimized by optical design software according to the purpose of use. design. Therefore, the shapes of the lens surfaces 10a and 10b, the lens thickness Th, the lens diameter D, the effective diameters Dea and Deb of the lenses, the concave amounts Za and Zb, and the like are all measurable. The physical quantities of the partial dimensions of the lens are shown in Figure 2. Here, the effective diameter of the lens means is the diameter indicating the effective portion, 11 312 XP / invention specification (supplement) / 94-05/94101807 1279605 wherein the lens has an optical function of the lens when light penetrates the lens. In an embodiment of the invention, one case is to arrange lenses of different refractive power between the lens surfaces. This effective diameter can be considered as an area which is deformed into a desirable shape by casting. From the experimental investigation by the inventors, it has been found that it is desirable that the effective diameter D e can be expressed by the following relation (1) regarding the lens diameter D. Here, D e is a larger value of D e a and D e b. D e ( mm) ^ D ( mm ) -0.3 (1)

For this lens, it is said that the part that plays the role of the lens frame is provided. The edge 12 is provided with a plate-like portion outside the effective diameter portion so as to surround the lens and have a fixed thickness. As shown in Fig. 3A, the lens has a planar portion 1 2 a on the outer side of the lens surface and an outermost circumferential surface 12b of the lens perpendicularly intersecting the surface. After the lens is formed, it is attached, fixed to a support or the like by the edge 12. That is, the outer circumferential surface 1 2 b of the edge 1 2 is fixedly mounted on the inner circumferential surface 24 of the through hole 22 of the lens holder 20 in a fixed manner as shown in FIG. Form. In addition, when the lens is operated by grasping the peripheral edge portion 12 alone, it can avoid inconvenience such as dust and scratches on the surface of the lens. As shown in FIG. 2 or FIGS. 3A and 3B, the lens is manufactured by integrally molding a glass material of the same type, and in terms of shape, as shown in FIG. 5, it can be divided into two parts 16a and 16b. It also has a portion of the lens surface and edge 12. The portions 1 6 a and 16 b include a lens surface 10 a and 10 b having an entity having a partially cut shape such as a nearly spheroid (which is not an accurate spheroid, since the lens surface is aspherical), And the edge 12 has a disc form formed by cutting a corner portion of the outer circumference into a circular corner. These round turns 12 312XP / invention manual (supplement) / 94 · 05 / 941018 〇 7 1279605 corner corner portion is called trimming 14. Since the peripheral surface 12b of the edge 12 is press-fitted into the lens holder. The portion of the circumferential surface 24 and thus the supporting lens is preferably set to have the radius of curvature of the thickness A and the trimming 14 as follows. The range is such that the lens is considered to be a stable rigid body. By using these calculated values for the design of the basic lens shape, a molded lens as a stable rigid body can be manufactured. It has been experimentally found that A/D-(K 25 ( 2 ) ^ and it is better to measure the thickness of the lens as T h (mm ) and the thickness of the edge 12 (A) in order to satisfy: A /Th ^0.5 ( 3 ) In addition, it is preferable to set the radius of the curvature R ( in m ) of the trimming 14 to a range: 0. 1 ^ R ^ ( A-0.25) /2 (4) The edge thickness A, and regarding the lens diameter D and the effective diameter De, is in the range of 0.1 ^ R $ ( D-De ) / 2 - 0. 0 2 5 ( 5 )

It judges R in an optimal manner so as to satisfy a narrower range of expressions (4) or (5). If a mold lens is to be formed in a size that does not meet the conditions of these basic lens shapes, the press-fit strength is lowered and the inconvenience such as shedding and cracking is involved. As shown in Fig. 4, the lens holder 20 is for supporting the above-described lens having a basic shape. A through hole 22 for inserting and mounting the lens is disposed in the body of the lens holder 20. The lens is fixed such that one of the through holes (total length 13 312XP / invention specification (supplement) / 94-05 / 94101807 1279605 degrees Η) corresponds to the optical axis direction of the lens. In this through hole, the inner circumferential portion 24 is firmly attached to the edge of the lens, and provides a cylindrical portion of the segment shape having a constant diameter D i regardless of the position. The preferred portion of the portion other than the cylindrical portion may be in the form of a cone near the surface of the support, since the glass raw material can be easily filled before casting. However, providing an unprojected portion on the inner side of the through hole is one of the features of the present invention. In order to press the mold lens into the inner circumferential surface 24 of the lens holder, the relationship between the lens volume and the lens holder volume must be suitably φ. If the amount of the glass raw material to be filled is too large, protrusion or the like will occur during casting, and lens debris or the like may occur. On the other hand, if the amount of the glass raw material is insufficient, the adhesion between the lens and the holder may become insufficient. At the same time, the diameter of the through hole of the lens holder has a processing tolerance and a specific level of unevenness in the volume of the holder. Although the volume of the glass raw material can be adjusted by weight, it is impossible to adjust it according to variations in the volume of the support. In the following, it will be explained that even when the volume of the support is uneven, it can be used to maintain the volume of the glass raw material in a constant amount.

method. In order to suppress the non-uniformity of the optical characteristics of one type of lens, the error of the volume of the portions 1 6 a and 16 b including the lens surfaces 10 a and 1 0 b must be very small. Therefore, there will be no room for adjustment of the volume of the portions 1 6 a and 16 b. On the other hand, a fixed tolerance is acceptable for the volume of the edge 12 portion. As shown in Figs. 6A to 6C, it is a schematic view of the volume change of the edge portion 12. As shown in Figs. 6B and 6C, the volume of the edge portion is changed according to the radius of the curvature R of the trimming 14, since this portion is in the fixed range 14 312XP / invention specification (supplement) / 94-05 / 94101807

Changes within 1279605 do not affect the optical properties of the lens or the attachment of the mount, so slight volume tolerances can be tolerated. That is, the lens volume is measured such that the radius of curvature R of the trimming 14 is within the allowable range of the formula (4) or (5). The lens of the present invention produced by casting a spherical glass raw material will be described below. Therefore, if the shrinkage of the material or the like is negligible during the casting process, the volume of the cast lens and the glass raw material will be considered equal. On the other hand, if the variation range of the inner diameter dimension of the inner circular surface of the through hole of the lens holder used is known, the range of the volume of the mirror φ after casting can be measured to press the mold lens on The inner circumferential surface of the support. In casting, by filling the volume of the glass material in such a range, even if the volume of the through hole of the lens holder has changed, the shape of the surface of the lens does not change at the lens and the lens holder. In general, the casting surface of the mold is provided in the peripheral portion of the mold of the optical element (sheet) as if it were not in contact with the shape of the holder or the mold, and at this point, the stamp is completed. For the variation of the inner diameter of the cylindrical portion of the through hole of the support, it is filled with the glass raw material by changing the mold or the support which does not contact the peripheral portion of the branch or the optical element to an allowable circumference. The volume can be maintained at a constant amount. However, the manufacturing and press-fitting process of the support is carried out at a temperature which becomes a glass deformation point of the raw material. Therefore, the glass raw material and the support material are changed in volume by their thermal expansion. Thus, as described above, when the volume of the glass material is adjusted, the influence of thermal expansion will not be taken into consideration, and during the heating or cooling process, great stress such as the degree of acceptance of the lens from the support and cracking and deformation may occur. The inconvenience of the lens or the opposite of the lens cannot be fixed to the seat. 312XP / invention manual (supplement) /94.05/94101807 The actual principle of the post-week sheet-like mirror is based on the principle of over-the-counter 15 1279605 Specifically, due to the shrinkage between the glass raw material and the support The difference mainly occurs during the cooling period. If the linear expansion coefficient of the glass raw material is larger than the linear expansion coefficient of the support material, the former will shrink more than the latter, and the lens cannot be fully pressed into the inner circumference of the support. surface. On the other hand, if the linear expansion coefficient of the glass raw material is much smaller than the linear expansion coefficient of the support, the lens will become too tight and the internal pressure will remain due to the support during cooling, and the phenomenon of attenuation in optical performance will be concentrated on The polarizing characteristics of the lens and the other may cause cracks in the interior or surface of the lens.

Therefore, it is important to select the raw materials for the lens and the support so that the linear expansion coefficients of the two are maintained in a fixed relationship, which can be specifically expressed by the following expression. 〇< (linear expansion coefficient of lens holder_linear expansion coefficient of glass raw material) S 20x1 (Γ7 ( /°C) ( 8 ) In one embodiment, the linear expansion coefficient is 1 0 2 X 1 ( The glass material of Γ7 / °C is used as a casting material. As for the one-piece material, a ferrite-grained stainless steel such as SF 2 0 T or SUS 4 3 0 is used. The linear expansion coefficient satisfying the above expression is 1 1 0 X 1 (Γ7 / °C and 1 1 4 X 1 (Γ7 / °C. Fertilizer iron stainless steel is a well-known free-cutting steel, which is beneficial for processing. (Lens manufacturing method) 7 to 9 are schematic views of a casting apparatus for manufacturing a lens in one embodiment of the present invention, and Fig. 7 is a schematic view showing a casting apparatus in which a piston 60 is regarded as a driving portion. Although omitted from the drawings, in practice, these members (casting units) for loading the glass raw material 16 may be placed in a closed space having a nitrogen atmosphere, and the heater for controlling the temperature is arranged to contact the base 50. Fig. 8 is casting Magnification of the central part of the unit 16 312XP / invention Ming (Supplement) / 94-05/94101807 1279605 Fig. 9 is a view showing the case where the glass raw material is press-fitted to the inner circumferential surface of the holder 20 after the mold enters the lens 100. The procedure, as shown in Fig. 7, is to insert the lens holder 20 into the shape of the inner side of the inner sleeve 40, for example, according to the structure of the lower die 34. The lower die 34 is internally The sleeve 40 is inserted into the through hole of the lens holder 20, and the spherical glass material 16 is supported by the through hole and the lower die. As shown in Fig. 9, the step is internally The inner hole of the sleeve 40 is provided, and by this step, the # position S of the lens holder 20 of the lower die 34 can be measured. By this mechanical means, the lens and the lens holder can be appropriately set. Relative position X. In this method, the lower die 34 is nip-adjusted so as to be inserted into the outer sleeve 46 with the glass raw material 16 and the upper die 32. The upper die 3 2 is freely Slide the inner side of the axial direction into the cylindrical through hole of the outer sleeve 46.

The component whose assembly has been completed is fixed to a stepped cylindrical support base called a base 50. Further, as shown in Fig. 7, on the base 50, for example, a metal or ceramic cover 52 is mounted. With these procedures, a casting unit including a mold and a glass raw material was completed. The casting unit is supported by holding the base 50 so as to maintain the axial direction of the cover 52 in a vertical direction, and this can be supported in or taken out of the casting apparatus. The cast unit which has been prepared is placed in a closed space filled with a nitrogen atmosphere, and heated to a predetermined temperature by a heater contacting the base at a surface. The predetermined temperature is a temperature at which the glass raw material can be softened into a moldable condition without occurrence of a fracture phenomenon such as cracking, and it is measured based on the characteristics of the glass raw material. The atmospheric pressure is generally around 40 °C, and therefore, in order to avoid oxidation of the casting unit, it is necessary to maintain the nitrogen atmosphere in the 312XP/invention specification (supplement)/94-05/94101807 1279605. In addition, due to the high temperature range as described above, it is necessary to supply the upper die 3 2 and the lower die 34 with a material which is sufficiently rigid to be used as a material for construction and relatively small in thermal expansion, and additionally, in order to improve the glass after casting. The purpose of mold reliability, as shown in Fig. 8, is to apply a tungsten mold release film to the front faces of the upper and lower conversion surfaces 3 2 a and 3 4 a. In one embodiment, the upper die 32 and the lower die 34 are fabricated from tungsten carbide representing a super-steel material, and are used for a mold release film, and may be mainly selected from tungsten (W)- or chromium (Cr〇). a base oxide or nitride material.

In the casting process, first, the glass raw material 16 in the casting unit is heated to a predetermined temperature range in a nitrogen atmosphere to sufficiently soften it to a state which does not cause a cracking phenomenon such as cracking of the glass. Next, as shown in Fig. 7, the upper die 32 is pressed in the direction indicated by the arrow, and the pressure can be appropriately controlled by the use of the piston 60. The end point of the casting operation by the upper die 32 can be measured by the optimum optical performance thickness Th of the lens design which is satisfactory. Therefore, as shown in Fig. 7, in the present embodiment, the diameter of the upper portion of the piston 60 is made larger than the diameter of the cover 52 by the method of controlling the end of the piston 60 of a computer or the like including an operation mode. That is, the point in time at which the upper portion of the piston is in contact with the upper end surface of the cover 52 is provided as the mechanical end point of the casting operation. Therefore, by changing the total height of the cover 52, the desired lens thickness Th can be obtained. This method has the necessary advantages such as simple construction and no complicated device control. A casting condition in which the piston 60 reaches a suitable end point, the glass raw material is molded by the conversion surfaces 3 2 a and 3 4 a of the upper and lower dies 3 2 and 3 4 , and the externally expanded glass raw material is Pressed on the inner circumferential surface of the lens holder 20 18 312XP / invention specification (supplement) / 94-05 / 94101807 1279605, thereby obtaining the final shape of the lens 10 as shown in the schematic view of FIG. As described above, by adjusting the position S of the lens holder relative to the lower die 34 and the step inside the inner sleeve 40 in the casting unit, it is in the axial direction of the lens and the lens holder. The relative position X is also quite strong.

Here, the shape of the casting surface of the upper die 32 and the lower die 34 is processed so that the designed lens surfaces 10a and 10b can be correctly converted, so that the planar portion of the peripheral portion 12 is Formed on the outside of these lens surfaces. As shown in Fig. 9, when the casting is completed, a slit exists between the casting surface of the upper die 3 2 and the lower die 34 and the inner circumferential surface of the through hole of the lens holder 20. Thereby, it is possible to provide a portion of the inner circumferential surface of the lens holder or the casting surface which is not in contact with the upper and lower molds on the surface of the tungsten mold lens. As shown in Fig. 9, the casting unit includes a lens 10 in which a mirror for completing the casting and press-fitting with the lens holder can be taken out from the casting device and sufficiently cooled while maintaining the "die". Thereafter, the lens 10 incorporating the lens holder 20 can be taken out of the casting unit to obtain an aspherical lens having a holder in a shape as shown in Fig. 1. The structure of the tungsten manufacturing apparatus is not limited to the above embodiments. In general, by providing a mechanical means to maintain the support at a predetermined position relative to any one of the other molds, and when the compression molding is completed, providing a mechanical means to measure the distance between the molds at a predetermined value . In the optical axis direction in the lens holder, the lens shape and the position of the lens can be measured with excellent reproducibility. The positioning by mechanical means can be carried out without adding complicated means such as computer control to the casting device. (Embodiment 1) The following is a specific embodiment of the present invention. As shown in Fig. 2 or Fig. 3A and 19 312XP/invention specification (supplement)/94-05/94101807 1279605 3B, the lens shapes are substantially the same, and they are in the shape shown in Fig. 4 Fixed to the lens holder. Hereinafter, the shape of the lens and the shape of the lens holder in this embodiment will be described. In the case of the shape of the aspherical lens, the amount of depression Z can be represented by a multiple expression from the center of the lens to the radius distance r: Z = T h + a r2 + b r4 + c r6 + dr8, and the aspheric coefficient a, b, c and d are the values as provided in Table 1. In addition, the dimensions and processing tolerances of the respective portions of the lens holder are shown in Table 2.

When the lens is a glass raw material, the glass has a linear expansion coefficient of 1 0 2 X 1 (Γ7 / °C glass is processed into a spherical shape, and it is used. As for the lens bearing material, the SF 2 0 T of the ferrite iron stainless steel is used. The linear expansion coefficient is 1 1 0 X 1 (Γ7 / °C. In order to manufacture the lens described above, the volume of the filled glass raw material is measured. Since De=Dea=1.54mm, D=1.985mm (the lens under consideration) The tolerance of the inner diameter of the through hole of the support is as shown in Table 2), D-De = 0. 445mm, which will satisfy the case of the expression (1). When these values are substituted, it is used to express the formula (4). And the expression (5), then two ranges of R can be obtained. From the expression (4), Ol^RSO. 2 3 9mm is obtained by the expression (5), 0.1SRS0.198mm, among these values, By selecting a narrower range, it is possible to measure the range of R such as 0.1 SRS 0.198 mm. If the outer circumferential surface 12b of the edge of the lens is firmly attached to the inner circumferential surface of the lens holder 24, the volume of the edge portion V k can be expressed by D, A and R: 20 312XP / invention specification (supplement) /94-05/94101807 1279605

Vk (mm3) = 4ttR3/3 + 2^R{(D-2R) /2}2+^2{(D-2R) /2 } R2+ 7Γ ( D/2 ) 2( A - 2R) ( 6 ) In the above range of R, when the volume Vk of the edge portion is measured within the tolerance range Di by the above expression (6), it can be obtained from Table 3 shown. Alternatively, the volume of the lens portions 16a and 16b, such as Va and Vb, may be provided, and the volume V of the integral lens may be provided by the following expression: V = Va + Vb + Vk (7) when the volume of the lens surface portions 16a and 16b is Va And Vb can be calculated on the basis of the shape shown in Table 1,

Vb = 0. 063mm3

As described above, when the lens volume V is calculated by the expression (7), the values as shown in Table 4 can be obtained. Therefore, when the inner diameter of the through hole is Di = l. 985 mm, the volume of the glass raw material is in a range of 2.530 to 2.604 mm3, and when Di = 1.995 mm, the range is 2.552 to 2.6271111113. Therefore, if the volume error due to the tolerance of the diameter of the through hole in the lens holder used is neglected by the radius of curvature of the correction, the overlapping portion of the above range can be sufficiently selected, that is, 2. 5 5 To the range of 2. 60 m m3. The actual volume of the spherical glass raw material can be measured simply by measuring its weight and dividing by its specific gravity. 21 312XP / invention manual (supplement) /94-05/94101807 1279605

(Table 1) Lens surface 1 0 a Lens surface 1 0 b Lens thickness Th 1 . 2 Aspherical coefficient a 0.6985 -0. 2857 Aspherical coefficient b 0. 0198 0.0374 Aspherical coefficient C -0. 2276 -0.0935 Aspherical coefficient d 0.3875 -0.1185 Effective diameter Dea=l. 54mm Deb=l.22mm Concave amount Z Za=0. 366mm Zb=0.106mm Edge thickness A 0. 728mm Note: Z=Th + ar2 + br4 + cr6 + dr8 (Table 2) Unit • mm Center value tolerance lens holder diameter Do 3 ±0.02 Through hole diameter Di 1 · 99 ±0.005 Through hole length h 0. 75 ±0.1 Lens support length Η 1 . 3 ±0.05 (Table 3) Edge part volume Vk (mm3) Through L inner diameter Di (mm) 1.985 1.995 Curvature R (mm) Correction radius 0.100 2.226 2.249 0.198 2.215 2.174 (Table 4) Edge part body color i (mm3) Through hole Diameter D i ( mm ) 1.985 1.995 Curvature R ( mm ) 0.100 2.604 2.627 Correction radius 0.198 2.530 2.552 312XP / invention manual (supplement) /94-05/94101807 22

1279605 (Embodiment 2) In this embodiment, an optical component as shown in Fig. 10, wherein the lens 10 fixed to the seat 100 has substantially the same shape as described in the above embodiment 1 is manufactured. . Although the lens holder portion 1 20 to which the lens 10 is fixed has the same structure as that of the embodiment 1, the holder 100 differs in that the cylindrical portion 1 2 2 has a larger portion in its portion. Inner diameter. By designing and fabricating the optical component, as shown in FIG. 11 or FIG. 12, the semiconductor laser wafer 70 and the lens are combined to be bonded to the base 72. The electrode on the wafer is connected to the wire Φ. On the surface of the base portion 7, the straight cylindrical portion 1 of the lens holder is a lens which is covered as shown in Fig. 10, and its contact point 76 is thus sealed and hermetically sealed. In the prior art, an inert gas such as helium is filled in the hollow portion 1 2 4 inside the cylindrical portion. From then on, the lens 110 of the figure is designed to act as a lens having an inf ini conjugate ratio to emit quasi-light from the semiconductor laser, which becomes a parallel beam 90 after exiting the lens 110. In the embodiment of Fig. 12, the lens 210 is designed to act as a lens having a unit yoke ratio to concentrate the light emitted from the semiconductor laser. In this embodiment, for example, the concentrated light beam 9 2 can be coupled to the optical fiber 80. Further, the wafer 70 is not limited to a semiconductor laser, and may be a light-emitting element such as a light-emitting diode, an ultra-cold light diode, or the like. On the other hand, it is a light receiving element. In an embodiment of the light receiving element, the outer side of the light can be concentrated on the light receiving wafer or the divergent light emitted from the optical fiber can be on the light receiving wafer. In addition, an element having a wide light receiving area can be used for incidence of collimated light. Here, as described above, in general, the inert gas system is filled in the hollow 312XP / invention specification (supplement) / 94-05 / 94101807 under the branch, the next 7 4 22 welding system 11 te straight The portion 23 1279605 is divided into 1 2 4, and this can be implemented for the purpose of protecting the light emitting/light receiving wafer from the inside of the external environment and avoiding oxidation. In the case of the optical component of the present invention, since the lens does not need to apply excessive pressure to press and bond on the inner circumferential surface of the lens holder, it has good airtightness and is firmly sealed by airtightness. The cylindrical portion 1 2 2 of the lens holder and the base portion 7 2 can be easily achieved by completely isolating the light exit/light receiving wafer from the external environment. Although, in the above specific examples and embodiments, the aspherical lenticular lens sheet in the optical assembly is combined with the lens holder, for example, in the present invention, φ is not limited thereto. The lens may be a spherical lens and may also be a convex lens sheet or a concave lens. In addition, it may be a diffractive optical element such as a Fresnel lens. In addition, the present invention can be widely applied to various types of optical components, and for the lens, various types of optical components formed by casting can be fixed to the holder using, for example, curved mirrors and cymbals. . [Simple description of the map]

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a partial view of a mold lens having a lens holder according to a specific example of the present invention. Figure 2 is a partial view of a mold lens of the present invention. 3A and 3B are external views of a mold lens of the present invention. Figure 4 is a partial elevational view of the lens holder of the present invention. Figure 5 is an illustration of the lens portion of the present invention. Figures 6A, 6B and 6C are partial schematic views of the shape of the peripheral portion of the lens of the present invention. Figure 7 is a schematic view of an apparatus for manufacturing a mold lens having a lens holder of the present invention. 24 312XP/Invention Manual (Supplement)/94-05/94101807 1279605 Fig. 8 is a schematic view of a central portion of a casting unit of the present invention. Figure 9 is a schematic view of the present invention after the casting is completed. Figure 10 is a partial elevational view of a mold lens for a semiconductor optical component having a lens holder of the present invention. Figure 11 is a partial view of a semiconductor optical component having a collimating lens of the present invention. Figure 12 is a partial elevational view of a semiconductor optical component having a concentrating lens of the present invention. [Description of main component symbols] φ 1 0, 1 1 0, 2 1 0 10a, 10b 12 12a 12b 14 1 5 16 16a, 16b Lens Lens surface Edge Plane part Outer circumferential surface Trimming Optical axis Glass raw material Part

20 22 24 32 32a, 34a 34 40 46 Lens holder Through hole Inner circumference part Upper die Conversion surface Lower die Inner sleeve Outer sleeve 25 312XP/Invention manual (supplement)/9^05/94101807 1279605

50 ^ 72 Base 52 Cover 60 Piston 70 Wafer 74 Wire 7 6 Contact point 80 Fiber 90 Parallel beam 92 Converging beam 100 Support 120 Lens holder portion 122 Straight cylindrical portion 124 Hollow portion A Thickness D Diameter D ea ^ Deb Effective diameter Do lens holder diameter Di through hole diameter H lens holder length h through hole length R curvature S position Th lens thickness X relative position Za, Zb concave amount 312XP / invention manual (supplement) /94-05/94101807 26

Claims (1)

1279605 X. Patent application scope: 1. An optical component comprising: an optical component, which is provided when casting a glass, comprising an effective portion and a protruding portion surrounding a peripheral portion of the effective portion; and a seat having a through hole for fixing the optical element, wherein an inner surface of the through hole is formed in a straight cylindrical shape, and an outer circumference of one of the peripheral portions is firmly mounted to the inner surface, wherein the outer circumference is surrounded by An entire circumference of the inner surface. 2. The optical component of claim 1, wherein a segment shape of the effective portion and a shape of a segment of the outer circumference of the peripheral portion are in a direction perpendicular to an optical axis of the optical element. a difference between a circular shape, and a diameter D e of the section shape of the effective portion and a diameter D of a section shape of the outer circumference of the peripheral portion is set to 0.3 mm or more. many. 3. The optical component of claim 2, wherein a ratio A of the thickness A of the peripheral portion to the diameter D of the outer circumference of the peripheral portion is 0.25 or Further, the ratio A/Th of the thickness A to the maximum thickness Th of the optical element is 0.5 or more. 4. The optical component of claim 3, wherein the peripheral portion comprises a plurality of surfaces perpendicular to the optical axis and an outer circumferential surface parallel to the optical axis; a corner portion disposed in the One of the surfaces, and perpendicular to the optical axis intersecting the outer circumferential surface, the corner portion forming a circle with a radius of curvature R; and the radius of curvature R is at 0 · 1 SRS (A - 0 · Within a range of 2 5 ) / 2, where R and A are in millimeters. The optical component of claim 3, wherein the peripheral portion has a plurality of surfaces perpendicular to the optical axis and is parallel to the optical axis. An outer circumferential surface of the heart; a corner portion disposed on one of the surfaces to intersect the outer circumferential surface, the corner portion forming a circle with a radius of curvature R; and the effective portion of the optical element a diameter D e and a diameter D of the outer circumference of the peripheral portion, the radius of the curvature R being within a range of 0.1 SR ^ (D-De)/2-0.025, wherein R, D and D e The unit is in millimeters. 6. The optical component of claim 1, wherein a linear expansion coefficient of the support is greater than a linear expansion coefficient of the glass raw material used to cast the optical component, and one of the differences is between 20 X 1 (Γ7 / °C or less. 7. The optical component of claim 1 wherein the optical component comprises a lens. 8. The optical component of claim 7 wherein the lens is An aspherical convex lens. The optical component of claim 7, wherein a cylindrical portion for inserting and fixing a semiconductor optical element is provided to connect the through hole of the holder to the fixed lens; An optical element is hermetically sealed within the cylindrical portion; and a distance between the lens and the semiconductor optical element is measured to condense or collimate the light emitted by the semiconductor optical element, or by The semiconductor optical component collects or collimates the received light. A manufacturing method for an optical component having a support includes the following steps: 28 312XP/Invention Manual (Supplement /94-05/94101807 1279605 a pair of mold insert through holes are at least partially. Pair; and optically surrounding one of the space effect portions, wherein the perimeter of the through hole is the entire circumference of the cylinder. 11. If applying for a special-purpose method, in which one of the molds is changed, a variation of the portion of the shape portion of the mold is maintained at a volume of 1 2 in a predetermined volume. The part is one of the corners, and one of them is vertical, thus changing its curvature. 3 . If applying for a special method, one of the pre-mechanical means of any one of the molds is intended to be placed in the support, wherein the formation of the ground is used. a glass raw material component with the medium-pressure mold, the effective portion having a peripheral portion; an inner surface of one of the outer circumferential fastening portions, so as to have a casting surface of the range 10 There is a portion of the peripheral portion, and the shape that is not in contact with the support is used in a constant amount in accordance with the change in the range. The eleventh item of the benefit range has a contact with the casting portion forming a circle, which is a radius commensurate with the outer circumferential surface. The item 10 of the benefit range has a support by the first machine position, and when the pressure value is measured on the opposite side of the through hole of one of the mold portions of the mold, thereby forming one including An optical function is formed with a mold for projecting an optical component fixedly mounted to a seat of the holder surrounding the inner surface, and when the portion is not in contact with the holder and the peripheral cylinder of the mold One of the inner diameters is such that the corner portion of the peripheral portion of the mold of the optical component that fills the glass stock support intersects the optical axis at a plurality of surfaces, and the mechanical means of the optical component of the mount remain A distance between the two by a second machine relative to completion. 312XP/Invention Manual (supplement)/94-05/94101807 29